Azo dyestuffs containing a complete radical of a styryl dyestuff

ABSTRACT

Azo dyestuff of the formula WHEREIN D is a diazo component, B a coupling component, A a paraphenylene and R1 and R2 are alkyl that may be substituted. The dyestuffs dye synthetic fibers in bright colors.

Elnite States Patent 1191 Peter ct a1.

1541 AZO DYESTUFFS CONTAHNHNG A COMPLETE RADICAL OF A STYRYL DYESTUFF [75] Inventors: Richard Peter; Haus-Joerg Augliker,

both of Basle, Switzerland [73] Assignee: Ciba-Geigy AG., Basle, Switzerland [22] Filed: July 21, 1970 [21] Appl. No.: 56,954

[30] Foreign Application Priority Data [56] References Cited UNITED STATES PATENTS 2,824,096 2/1958 Heckert ..260/206 X 1 1 Feb. 20, 1973 3,069,408 12/1962 Meflan 61 a1. ..260/158 3,097,198 7/1963 Fishwick 61 al ..260/2o7.1 3,190,861 6/1965 Fertig 61 a]. ..260/207 x 3,337,522 8/1967 Wegmuller ..260/158 3,518,244 6/1970 Mundlos et 31.. ..260/149 3,542,758 11/1970 Hegar ..260/156 Primary Examiner-Floyd D. Higel Attorney1-1arry Goldsmith, Joseph G. Kolodny and Mario A. Monaco [57] ABSTRACT Azo dyestuff of the formula ON R1 l DN=NBXC=CH-AN\ wherein D is a diazo component, B a coupling component, A a paraphenylene and R and R are alkyl that may be substituted. The dyestuffs dye synthetic fibers in bright colors.

8 Claims, No Drawings AZO DYESTUFFS CONTAINHNG A COMPLETE RADICAL OF A STYRYL DYESTUFF in which X represents a sulphone, carboxylic acid ester or carboxylic acid amide residue, n l or 2, the residues R and R are alkyl residues that may be substituted, and R may form a tetramethylene chain bound in ortho-position with the residue A, A represents a para-phenylene residue that may be substituted and F represents the residue of an azo dyestuff that is free from sulphonic acid groups.

Dyestuffs that may be specially mentioned are those of the formula in which D represents the residue of a diazo component, B represents the residue of a coupling component and X, A, R, and R have the meanings given above, and especially the dyestuffs of the formula in which 0, d and d each represents a hydrogen or a chlorine atom, a lower alkyl group or a lower alkoxy group or a phenyl, phenoxy or phenylthio group, c is the same as c, d or d or represents a bromine atom, a trifluoromethyl group or an acylamino group, R, represents an optionally substituted alkyl residue that may form a tetramethylene chain bound to the benzene residue in ortho-position, R represents an optionally substituted alkylene residue that may be interrupted by hetero atoms and R R X and D have the meanings given above. The dyestuffs may be further represented y wherein X is -arylene-SO -OCON(CH C,,H )CO or N(C,C -alkyl)C0, c, d and d each is hydrogen, chlorine, C,C -alkyl, C -C -alkoxy, phenyl, phenoxy or phenylthio, C is the same as c, d or d or is bromine, trifluoromethyl, C -hydrocarbylcarbonylamino, C -hydrocarbylsulfonylamino, C -hydrocarbyloxycarbonylamino or C -hydrocarbylaminocarbonylamino, each of said hydrocarbyl moieties being aryl or saturated acyclic hydrocarbyl, R is hydrogen or C -alkyl, R R R and R each are, independently, unsubstituted C,C -alkyl residue that may form a trimethylene chain bound to the benzene residue in ortho-position, or C C -alkyl optionally interrupted by oxygen and substituted by chlorine, fluorine, hydroxy of C C -alkyl, C,C -alkoxy, C C -alkylcarbonyloxy, cyano, bromine, phenyl, phenoxy, phenylmercapto, dichlorophenylmercapto, methoxycarbonyl-thienyl-2-carbonyloxy, trifluoromethyl, benzoyloxy-, methoxycarbonyl-benzoyloxy, methoxybenzoyloxy, C C -alkylaminocarbonyloxy, phenylaminocarbonyloxy, C,C -alkylaminocarbonylamino, C,C -alkyloxycarb0nyl0xy or C,C -alkoxycarbonyl, m and n are each 0 or 1, only one of said m and n being zero at any one time and D is a diazo component of the benzene series.

Also valuable are the dyestuffs of the formula which are obtainable by condensation of a cyanoacetic acid amide of the formula with a para-aminobenzaldehyde of the formula R1]! 0 CH N in which D, R R c, d and d have the meanings given above, R and R have the same meanings as R, and R and R represents a lower alkyl residue, especially a methyl or ethyl group, or is preferably a hydrogen atom. The residues 0, d and d each represents a hydrogen or chlorine atom, a lower alkyl-or alkoxy residue, for example, a methyl, ethyl, methoxy or ethoxy residue, or a phenylthio or phenoxy residue.

The residue c can have the same meaning as c and also stand for a bromine atom, a trifluoromethyl group and an acylamino group that may be alkylated, preferably methylated, at the nitrogen atom and in which the acyl residue is the residue of a lower carboxylic acid, for example, a formyl, acetyl, propionyl, butyryl or benzoyl residue, the residue of an organic monosulphonic acid, for example, a methane-, ethaneor para-toluenemonosulphonic acid residue, or the residue of a carbonic acid monoester or monamide, for

example, a methoxycarbonyl, phenoxycarbonyl, aminocarbonyl or butylaminocarbonyl residue.

The groups R R and R, can be identical or different and can each represent a hydrogen atom, an alkyl or substituted alkyl group, for example, a halogenated alkyl group, for example, a B-chloroethyl, [3, B, B-trifluoroethyl, B, 'y-dichloropropyl, benzyl, B- phenylethyl or B-cyanoethyl group; an alkoxyalkyl group, for example a B-ethoxyethyl or S-methoxybutyl group; a hydroxyalkyl group, for example, a B-hydroxyethyl or [3;y-dihydroxypropyl group; a carbalkoxy group, for example, a B-carbo-(methoxy-, ethoxyor propoxy)-ethyl group (in which the terminal alkyl group in m'-p0sition can carry a cyano, carbalkoxy, acyloxy or alkoxy group) or a B- or y-carbo(methoxyor ethoxy)-propyl group; an acylaminoalkyl group, for example, a B-(acetylor formyl)-aminoethyl group; an acyloxyalkyl group, for example, a B-acetyloxyethyl or B,y-diacetoxypropyl group; a B-alkylsulphonylalkyl group, for example, a fl-methanesulphonylethyl ethyl or B-ethanesulphonylethyl group; an alkylor arylcarbamoyloxyalkyl group, for example, a B-methylcarbamyloxyethyl group; an alkyloxycarbonyloxyalkyl group, for example, a B-(methoxy-, ethoxyor isopropyloxy)-carbonyloxyethyl, 'y-acetamidopropyl, B-(B-acetylethoxycarbonyl)-ethyl, B'-[B'-(cyano-,

hydroxy-, methoxyor acetoxy)-ethoxycarbonyl]- ethyl, cyanoalkoxyalkyl, fl-carboxyethyl, B-acetylethyl, B-diethylaminoethyl, B-cyanoacetoxyethyl, fibenzoyloxyethyl or B-(para-alkoxyor phenoxresidues R (the terminal amino group of the azo dyestuff is included to indicate the position):

The residue X is, for example, a group corresponding to one of the following formulas (the group --C(CN)= is included to indicate the position):

The introduction of the residue X may be effected by condensation, for example, by transesterification of a styryl dyestuff ester with a coupling component that contains a B-hydroxyethyl group attached to the nitrogen atom.

The diazo residue D is derived primarily from monocyclic or bicyclic amines of the formula for example, any diazotizable amines that are free from 7 substituents imparting solubility in water, but especially amines that contain a heterocyclic five-membered ring having two or three hetero atoms, especially a nitrogen and one or two sulphur, oxygen or nitrogen atoms, and aminobenzenes, especially negatively substituted aminobenzenes, particularly those of the formula in which a represents a hydrogen or a halogen atom or an alkyl, alkoxy, nitro, cyano, carbalkoxy or alkylsulphone group, b represents a hydrogen or a halogen atom or an alkyl, cyano or trifluoromethyl group, e represents a nitro, cyano, carbalkoxy or alkylsulphonyl group or a halogen atom and f represents a hydrogen or halogen atom or carbalkoxy or a carboxylic acid amide group.

The following are given as examples: Z-aminothiazole, 2-amino-5-nitrothiazole, Z-amino-S- methylsulphonylthiazole, 2-amino-5-cyanothiazole, 2- amino-4-methyl-S-nitrothiazole, 2-amino-4- methylthiazole, 2-amino-4-phenylthiazole, 2-amino-4- (4'-chloro)-phenylthiazole, 2-amino-4-(4-nitro)- phenylthiazole, 3-aminopyridine, 3-aminoquinoline, 3- aminopyrazole, 3-amino-l-phenylpyrazole, 3-aminoindazole, 3-amino-l ,2,4-triazole, 5-(methyl-, ethyl, phenylor benzyl)-l,2,4-triazole, 3-amino-l-(4-methoxyphenyl)-pyrazole, 2-aminobenzthiazole, 2-amino-6- methyl benzthiazole, 2-aminc-6-methoxybenzthiazole, 2-amino 6-chlorobenzthiazole, 2-amino-6- cyanobenzthiazole, 2-amino-6-thiocyanobenzthiazole, 2-amino-6-nitrobenzthiazole, 2-amino-6-carboethoxybenzthiazole, 2-amino-(4- or 6)-methylsulphonylbenzthiazole, 2-amino-1,3,4-thiadiazole, 2-amino- 1,3,5-thiadiazole, 2-amino-4-phenylor -4-methyll ,3 ,S-thiadiazole, 2-amino-5-phenyll ,3 ,4-thiadiazole, 2-amino-3-nitro-5-methylsulphonylthiophene, 2-

' aminoazobenzene,

amino-3,5-bis(methylsulphonyl)-thiophene, S-amino- 3-methylisothiazole, 2-amino-4-cyanopyrazole, 2-(4'- nitrophenyl)-3-amino-4-cyanopyrazole, 3- or 4- aminophthalimide, aminobenzene, l-amino-Z- trifluoromethyl-4-chlorobenzene, l-amino-2-cyano-4- chlorobenzene, l-amino-2-carbomethoxy-4- chlorobenzene, 1-amino-2-carbomethoxy-4- nitrobenzene, 1-amino-2-chloro-4-cyanobenzene, l-

amino-2-chloro-4-nitrobenzene, 1-amino-2-bromo-4- nitrobenzene, l-amino-2-chloro-4-carbethoxybenzene, l-amino-2-chloro-4-methylsulphonylbenzene, lamino-2-methylsulphonyl-4-chlorobenzene, l-amino- 2,4-dinitro-6-methylsulphonylbenzene, l-amino-2,4- dinitro-6-(2'-hydroxyethylsulphonyl)benzene, lamino-2,4-dinitro-6-(2-chloroethylsulphonyl)benzene, l-amino-2-methylsulphonyl-4- nitrobenzene, l-amino-2-methylsulphinyl-4- nitrobenzene, 1-amino-2,4-dinitrobenzene, l-amino- 2,4-dicyanobenzene, l-amino-2-cyano-4-methylsulphonylbenzene, 1-amino-2,6-dichloro-4- cyanobenzene, l-amino- 2,6-dichloro-4-nitrobenzene, lamino-2,4-dicyano-6-chlorobenzene, 4-aminobenzoic acid cyclohexyl ester, 1-amino-2,4-dinitro-6- chlorobenzene and especially l-amino-2-cyano-4- nitrobenzene, also l-aminobenzene-2-, -3- or -4- sulphonic acid amides, for example, N-methylor N,N- dimethylor -diethyl amide, N,y-isopropyloxypropyl-Z- aminonaphthalene-6-sulphonic acid amide, N,'yisopropyloxypropyl-l-aminobenzene-2-, -3- or -4- sulphonic acid amide, N-isopropyl-l-aminobenzene-2-, -3- or -4-sulphonic acid amide, N,'y-methoxypropyl-laminobenzene-2-, -3- or -4-sulphonic acid amide, N,N- bis(B-hydroxyethyl)-l-aminobenzene-2-, -3- or -4- sulphonic acid amide, 1-amino-4-chlorobenzene- 2- sulphonic acid amide and the N-substituted derivatives thereof, 2-, 3- or 4-aminophenylsulphamate, 2-amino- 4-, -5- or -6-methylphenylsulphamate, 2-amino'5- methoxyphenylsulphamate, 3-amino-6-chlorophenylsulphamate, 3-amino-2,6-dichlorophenylsulphamate, 4-amino2- or -3-methoxyphenylsulphamate, N,N- dimethyl-2-aminophenylsulphamate, N,N-di-n-butyl-2- aminophenylsulphamate, N,N-dimethyl-2-amino-4- chlorophenylsulphamate, N,npropyl-3-aminophenylsulphamate, N,N-di-n-butyl-3-aminophenylsulphamate, O(3-aminophenyl)-N-morpholine-N-sulphonate,

O(3-aminophenyl)-N-piperidine-sulphonate, N- cyclohexyl-O-(3-aminophenyl)-sulphamate, N(N- methylaniline)-O-( 3-aminophenyl)sulphonate, N,N- diethyl-3-amino-6-methylphenyl-sulphamate, N- ethyleneimine-O-(4-aminophenyl)-sulphonate, N,N-

dimethyl-4-aminophenylsulphamate, O-(n-propyl)-O- (3-aminophenyl)sulphonate, O,B-chloroethyl-O-(2- aminophenyl)sulphonate, O-benzyl-O-(3-aminophenyl)sulphonate, O-ethyl-O-(4-amino-2,G-dimethylphenyl)sulphonate, 4-aminoazobenzene, 3,2-dimethyl-4- Z-methyI-S-methoxyaminoazobenzene, 4-amino-Z-nitroazobenzene, 2,5- dimethoxy-4-aminoazobenzene, 4-methoxy-4- aminoazobenzene, 2-methyl-4'-methoxy-4'- aminoazobenzene, 3,6,4'-trimethoxy-4- aminoazobenzene, 4chloro-4-aminoazobenzene, 2- or 3'-chloro-4-aminoazobenzene, 3-nitro-4-amino-2 ,4'-dichloroazobenzene and 4-aminoazobenzene-4- sulphonic acid amide.

Instead of the above-mentioned diazo components free from ionic groups imparting solubility in water, those containing fiber-reactive groups may also be used, for example, s-triazinyl residues carrying one or two chlorine or bromine atoms on the triazine ring, pyrimidyl residues carrying one or two chlorine atoms or one or two arylsulphonyl or alkanesulphonyl groups on the pyrimidine ring, monoor bis-(y-halogeno-B- hydroxypropyl)-amino groups, B-halogenoethylsulphamyl residues, B-halogenoethoxy groups, B- halogenoethylmercapto groups, 2-chlorobenzthiazolyl- 6-azo groups, 2-chlorobenzthiazolyl-6-amino groups, 'y-halogeno-B-hydroxypropylsulphamyl residues, chloroacetylamino groups, a,B-dibromopropionyl groups, vinylsulphonyl groups and 2,3-epoxypropyl groups.

The following are examples of suitable fiber-reactive diazo components: N,B-chloroethyl-3-chloro-4-aminobenzene sulphamide (hydrochloride), N,B-chloroethyl-4-aminobenzene sulphamide (hydrochloride), 3-bromo-4-amino-mchloroacetophenone, N,y-chloro-B-hydroxypropyl-4- aminobenzene sulphamide, N,B-chloroethyll -amino-4 -naphthylsulphonamide, N,B-chloroethyl-l-amino-3,5- dichlorobenzenesulphamide and 4-(y-chloro-B- hydroxypropoxy)-aniline.

The diazotization of the above-mentioned diazo components can be effected, for example, with a mineral acid and sodium nitrite or, for example, with a solution of nitrosylsulphuric acid in concentrated sulphuric acid, depending on the position of the amino group concerned.

Coupling can be carried out in known manner, for example, in a neutral to acid medium, if necessary, in the presence of sodium acetate or a similar buffer that influences the rate of coupling, or a catalyst, for example, 'dimethylformamide or pyridine, or the salts thereof.

The dyestuffs can also be manufactured by reacting two dyestuff molecules (A) and (B) of the formulas (A) DN=NBZ' C in which D, B, R,, R d and c have the meanings given above, X CN, -SO -aryl, CONH or COO- alkyl, Z OH, --NH SH or -NH-alkyl and Z" a reactive halogen atom, -OCOCI, -OCO- alkylene-OCOC| or OCO-alkylene-CO--Cl.

In this manner the dyestuffs of the formula R! X are obtained, in which Z represents a divalent organic residue or an oxygen atom or an NH group, preferably a residue of the formula OCO-alkylene- CO-O or O--CO0-.

Those representatives of the above-mentioned heterocyclic diazo components that contain a quaternatable nitrogen atom can also be coupled by oxidation in the N-alkylated form as hydrazones or as azosulphones (cf. Angewandte Chemie, Volume 70, 215 [1958]; Volume 74, 818 [1962]; Volume 80, 343 [1968]).

Those representatives of the new dyestuffs that contain a quaternated amino group can also be obtained by quaternating the corresponding dyestuffs that contain a nonquaternated amino group by treating with alkylatin g agents.

Examples of suitable alkylating or quaternating agents are as follows: esters of strong mineral acids or organic sulphonic acids, for example, dimethyl sulphate, diethyl sulphate, alkyl halides, for example, methyl chloride, methyl bromide or methyl iodide, aralkyl halides, for example, benzyl chloride, esters of low-molecular alkane sulphonic acids, for example, methyl esters of methane-, ethaneor butane-sulphonic acid, and esters of benzene-sulphonic acids that can contain additional substituents, for example, methyl-, ethyl-, propylr butyl-esters of benzene sulphonic acid, of 2- or 4-methylbenzene sulphonic acid, 4- chlorobenzene sulphonic acid or 3- or 4-nitrobenzene sulphonic acid.

It is expedient to effect alkylation by heating in an inert organic solvent, for example, a hydrocarbon, for example, benzene, toluene or xylene, a halogenated hydrocarbon, for example, carbon tetrachloride, tetrachloroethane, chlorobenzene or orthodichlorobenzene, or a nitrohydrocarbon, for example, nitromethane, nitrobenzene or a nitroanaphthalene. Acid anhydrides, acid amides or nitriles, for example, acetic anhydride, dimethylformamide or acetonitrile or also dimethyl sulphoxide can also be used as solvents in the alkylation process. Instead of a solvent, a large excess of alkylating agent may also be used. In this case, care must be taken to ensure that the mixture is not unduly heated, since the reaction is strongly exothermic. It is nevertheless necessary in most cases, especiallyin the presence of organic solvents, to heat the reaction mixture externally in order to initiate the reaction. 1n special cases, the alkylation can also be carried out in an aqueous medium or with'the use of an alcohol, if necessary, in the presence of a small amount of potassium iodide.

Should it be necessary, purification of the dyestuff salts is advantageously effected by dissolution in water, any unreacted starting dyestuff being removed by filtration in the form of insoluble residue. The dyestuff can be reprecipitated from the aqueous solution by the addition of a water-soluble salt, for example, sodium chloride.

The non-quaternated dyestuffs are generally insoluble in water.

The new dyestuffs, mixtures thereof, and mixtures of the new dyestuffs with other azo dyestuffs are eminently suitable for dyeing and printing leather, wool and silk and especially synthetic fibers, for example, acrylic or acrylonitrile fibers, polyacrylonitrile fibers and copolymers of acrylonitrile and other vinyl compounds, for example, acrylic esters, acylamides, vinyl- For dyeing in an aqueous liquor, the water-insoluble dyestuffs are advantageously used in a finely divided form and dyeing is carried out in the presence of a dispersing agent, for example, sulphite cellulose waste liquor, or a synthetic detergent, or a combination of different wetting and dispersing agents. Prior to dyeing, it is generally advantageous to convert the dyestuff into a dyeing preparation that contains a dispersing agent and the dyestuff in a form such that a fine dispersion is obtained when the preparation is diluted with water. Such dyestuff preparations may be obtained in known manner, for example, by grinding the dyestuff in the dry or wet state in the presence or absence of a dispersing agent.

To obtain stronger dyeings on polyethylene terephthalate fibers it is generally advantageous to add a swelling agent to the dyebath, or more especially to carry out the dyeing process under superatmospheric pressure at a temperature above C, for example, at C. Suitable swelling agents are aromatic carboxylic acids, for example, benzoic acid and salicyclic acid; phenols, for example, orthoor para-hydroxydiphenyl; aromatic halogen compounds, for example, orthodichlorobenzene or diphenyl.

For thermofixation of the dyestuff, the padded polyester fabric is heated to a temperature above 100C, for example, to a temperature between and 210C, advantageously after drying, for example, in a current of warm air.

The dyeings obtained in accordance with the present process can be subjected to an after-treatment, for example, by heating with an aqueous solution of a nonionic detergent.

The dyestufis may also be applied by printing processes. In this method of application a printing paste is used that contains, for example, the finely dispersed dyestuff and the usual printing adjuvants, for example, wetting and thickening agents.

Furthermore, dyeing can also be carried out in a dyebath containing an organic solvent, for example, a mixture of perchloroethylene and dimethylformamide.

The above-mentioned processes yield strong dyeings and prints possessing good properties of fastness.

The new water-insoluble dyestuffs can also be used in the spin-coloration of polyamides, polyesters and polyolefins. The polymer to be colored is advantageously in the form of a powder, grains or chips, in the form of a spinning solution or in the molten state when mixed with the dyestuff, the latter being either in the dry state or in the form of a dispersion or solution in a solvent that may be volatile. The dyestuff is homogeneously dispersed in the polymer solution or melt and the mixture is then processed into fibers, yarns, monofilaments, films, and so forth, in known manner by casting, compression moulding or extrusion.

The following Examples illustrate the invention, the parts and percentages being by weight, unless otherwise stated.

EXAMPLE 1 47.5 Parts of N-B-cyanoethyl-N-B-hydroxyethylaniline and 42.6 parts of cyanoacetic acid are refluxed for 16 hours with 100 parts of benzene in a water separator during which 4.3 parts of water, corresponding to a yield of 95 percent, are separated. The residue is diluted with benzene and the excess of cyanoacetic acid is washed out with water in a separating funnel. The benzene phase is dried and evaporated. 58 Grams (90 percent of the theoretical yield) of the cyanoacetic ester remain behind in the form of a yellowish, thick oil corresponding to the formula 1.8 Parts of 2-chloro-4-nitroaniline are diazotized in the usual manner with 1N nitrosylsulphuric acid, and the product is discharged at 0 to 10 into 140 parts by volume of a 6:1 mixture of acetic acid and propionic acid. A solution of 5.7 parts of the coupling component of the above formula in 70 parts by volume of the acid mixture specified above is added dropwise to the solution at 0 to 10C, the batch is stirred for 1 hour at 0 to 10C, 100 parts of water are slowly added dropwise at that temperature, the batch is stirred overnight at 0 to 10C, the precipitate that forms is isolated by powerful vacuum filtration and washed with water until the washings run neutral. The residue is dried and 5 parts (67 percent of the theoretical yield) of the styryl-azo dyestuff of the formula are obtained.

6.6 Parts of this aldehyde are condensed with 5.2 parts of the amine of the formula given above in parts by volume of dioxane with the addition of catalytic amounts of piperidine. The batch is refluxed for 4 hours while stirring, the dioxane is removed by distillation and the coupling component is obtained in the form of an orange-red oil; it corresponds to the formula Gil 1400C TABLE 1 I II III 1 0 Calls Orange.

OzN- Nllz C N\ II C2ll4()C() (H 1 0 0,11 Sanmasnhovu "C lI CalhCN 3 O Czlll l 1 Do.

C- -N\ 11 CzIIaCN 4 O\ /C:H5CN d0 Do.

Q H O l-1400K:

5 O CzHACN d0 Do.

(371140 C Cll:

C211 Same as above Do.

c- -N 11 011-140 (Jo- 3 a o .-do Do.

oONumLococmn H 9 O\ C1115 d0 D0.

10 0' 0,115 m do Do.

H CQH4CN C N(C:H|OCOCH3) dO D0. II

12 0 C ILCN do D0.

H CzHaO CH:

13 O\ /C H CN Undo DO.

H (III-14000011:

14 O r (31 Yellowisbbrown.

cON c,m0N OgN- NH3 H 15 0 ClIIfi Yellowish-orange.

C1 cnaoqs- NII2 C N H CzH4S C1 16 o 0,11 I Do.

\ C1QNH1 19 Same as abdve Red;

2O O C3Hq Oran e.

H mmocoQ-oooom 000cm 15 16 with a compound listed in Column I and then coupling is obtained which dyes polyacrylonitrile fibers a yellow with a diazo compound of an amine listed in Column ll. shade.

The shade obtained on polyester is listed in Column [11.

I II III 1 04H; 3N Red.

N 3 l ciHio c O-CI-Ir-CN 2 Orange. @mmmoooonm OzN NH:

11IHC OCHz-CN 3 Cl Do.

N(C2H4CN)2 OzNONII-: NIIC -CH2-CN 4 /C zHiCN CeH5-f-I;I D0.

N N C-NHQ Yellowish-red.

| C2H4CN 02N NHg C2H40CO-CH2CN i A C1 IIOC2H CN W Cl NH2 6 N Do.

1 C2H4OCO--CHz-CN 7 Fa a OCH ] CzHs 7 N\ Same as above Do.

C2H4OCOCH2CN CzIIqCN Cl. 8 N Orange.

\ iN --NH2 CHOCOCH2CN ciHioco-om-cN omC-mh EXAMPLE 2 The batch is stirred for some time, the dyestuff is salted out with sodium chloride, isolated by filtration and dried in vacuo. A product of the formula EXAMPLE 3 Seven Parts of dyestuff No. 17 listed in Table l are heated to about 80C in parts of dimethylformamide, and 2 parts of dimethyl sulphate are added. The batch is stirred at the same temperature until the dyestuff is fully quaternated. The product so obtained is precipitated by the addition of ethyl acetate, isolated, and dried in vacuo. A dyestuff of the formula 1 cnn-oco-om is obtained that dyes polyacrylonitrile fibers a bluish green shade.

The dyestuffs listed below are obtained in an analogous manner and dye polyacrylonitrile fibers the shades indicated:

wherein X is [arylene]phenylene SO OCO [0, d and d]c, d and d each is hydrogen, chlorine, C C -alkyl, C C,-alkoxy, phenyl, phenoxy or phenylthio, [C'] C is the same as [c, d or d] c, d or d or is Red.

i C2H40CO CzHiOCOCH; CH3

c=c N NC C2H4O C O CH:

Cl /C2H40-C2H4CN CH N 02114-0 c 0 /C:H4CN Ycllowish-red. c1

I? CH3 NC 4 0211000011 CH; Cl- Bluish-green. CIIJCN C2115 I! II c\ /CN=N N\ H 6 3 CzH4OCO CQILCOOCH;

c=c N NC C2115 CzH5 ( c H 000 CIIOCONIICII 2 4 2 4 2 OzN c1 6 S /C=C N\ D0. NC 02115 i Br i 01- N\ C2H4CN CzlI4OCO\ CQHGOUOHUQIL',

(:c- N NC um,

We claim: bromine, trifluoromcthyl, C, -hydrocarbylcarbon- 1. A dyestuff of the formula ylamino, C -hydrocarbylsulfonylamino, C

hydrocarbyloxycarbonylamino or C -hydrocarbylaminocarbonylamino, R is hydrogen or C, -alkyl, R R R and R, each are, independently, [unsubstituted C -c alkyl residue that may form a trimethylene chain bound to the benzene residue in ortho-position or C,[C ]C -alkyl or C,--C -oxaalkyl [optionally interrupted by oxygen] and C,C alkyl or C ---C -oxaalkyl, substituted by chlorene, fluorine, hydroxy or C -[C lC -alkyl, C [[C ]C alkoxy, C -[C ]C -alkylcarbonyloxy, cyano, bromine, phenyl, phenoxy, phenylmercapto, dichlorophenylmercapto, methoxycarbonyl-thienyl-2-carbonyloxy,

trifluoromethyl, benzoyloxy-, methoxycarbonylbenzoyloxy, methoxybenzoyloxy, C,[C ]C -alkylaminocarbonyloxy, phenylaminocarbonyloxy, C,[ C ]C,,-alkylaminocarbonylamino, C,{C ]C -alkyloxycarbonyloxy or C -[C lC -alkoxycarbonyl, m and n are each 0 or 1, only one of said m and n being zero at any one time and D is [a diazo component of the benzene series} phenyl carrying up to three substituents selected from the group consisting of chlorine, bromine, cyano, nitro, methyl sulfonyl, methyl, methoxycarbonyl, ethoxycarbonyl, methylsulfinyl, hydroxyethylsulfonyl, chloroethylsulfonyl, cyclohexyloxycarbonyl, -S0 -NHCH -SO N(CH SO N(C H isopropyloxypropylaminosulfonyl, isopropylaminosulfonyl, methoxypropylaminosulfonyl or SO N(CH CH OH) 2. The compound of claim 1 wherein n is zero.

3. An azo dyestuff as claimed in claim 1 of the formula 4 An azo dyestuff as claimed in claim 3 of thejormula d, 1 1 ON S. An azo dyestuff as claimed in claim 1 of the formula 7. A dyestufi according to claim 1 of the formula GQHECN CgI-I;-O

H50: C=O

UNITED STATES PATENT OFFICE QERTIFICATE 0F CQRREQTION Patent NO. 3,717,625 Dated February 20, 1973 Inventor(s) PETER ET AL It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 19, claim 3, in the formula, correct the p-=phenylene group by moving d' from the position ortho to the azo bridge to the position meta to the azo bridge; as corrected, this position of the formula should read as follows:

D-N=N Column 20, claim 5, in the formula, change s' and 12" to R1 a Signed and sealed this 20th day of November 1973 (SEAL) Attest:

EDWARD M.FMiITCHIifiR,JR

RENE D. TEGTMEYER Attesting Officer Acting Commissioner of Patents ORM PO-IOSO (10-69) USCOMM-DC 80376-P69 u 5 LUVKVNMENT rnlrnmr, mum mm n 

1. A dyestuff of the formula
 2. The compound of claim 1 wherein n is zero.
 3. An azo dyestuff as claimed in claim 1 of the formula
 4. An azo dyestuff as claimed in claim 3 of the formula
 5. An azo dyestuff as claimed in claim 1 of the formula
 6. A dyestuff according to claim 1 of the formula
 7. A dyestuff according to claim 1 of the formula 